diff --git a/basis/tools/scaffold/scaffold.factor b/basis/tools/scaffold/scaffold.factor
index 9e1d08e352..8fd3e53e19 100644
--- a/basis/tools/scaffold/scaffold.factor
+++ b/basis/tools/scaffold/scaffold.factor
@@ -94,7 +94,7 @@ M: bad-developer-name summary
     ] with-string-writer ;
 
 : set-scaffold-main-file ( vocab path -- )
-    [ main-file-string ] dip utf8 set-file-contents ;
+    [ main-file-string 1array ] dip utf8 set-file-lines ;
 
 : scaffold-main ( vocab-root vocab -- )
     [ ".factor" vocab-root/vocab/suffix>path ] keep swap scaffolding? [
@@ -106,8 +106,8 @@ M: bad-developer-name summary
 : scaffold-metadata ( vocab file contents -- )
     [ ensure-vocab-exists ] 2dip
     [
-        [ vocab/file>path ] dip swap scaffolding? [
-            utf8 set-file-contents
+        [ vocab/file>path ] dip 1array swap scaffolding? [
+            utf8 set-file-lines
         ] [
             2drop
         ] if